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Atomic Clocks

Time Dissemination Precision Measurement Leap Seconds Nuclear Clocks Caesium Atom Optical Clocks Physikalisch-Technische Bundesanstalt NIST Rubidium Atomic Frequency Standards Lutetium Clock Lutetium Clocks

Singapore Lab Builds World's Most Accurate Lutetium Atomic Clock

Verified to 19 decimal places with a 1×10^-19 uncertainty, the result could influence the post-2030 redefinition of the SI second.

Largest Global Optical Clock Comparison Paves Way to Redefine the Second